Fix LUT entry calculator for XYZ PCS with non-identity matrix

src/ImageSharp/ColorProfiles/Icc/Calculators/LutEntryCalculator.cs

@@ -37,7 +37,7 @@ internal class LutEntryCalculator : IVector4Calculator
     {
         if (this.doTransform)
         {
-            value = Vector4.Transform(value, this.matrix);
+            value = Vector4.Transform(value, Matrix4x4.Transpose(this.matrix));
         }
 
         value = CalculateLut(this.inputCurve, value);

tests/ImageSharp.Tests/ColorProfiles/Icc/Calculators/LutEntryCalculatorTests.cs

@@ -14,7 +14,7 @@ namespace SixLabors.ImageSharp.Tests.ColorProfiles.Icc.Calculators
     [Trait("Color", "Conversion")]
     public class LutEntryCalculatorTests
     {
-        [Theory(Skip = "Results do not match not expected.")]
+        [Theory]
         [MemberData(nameof(IccConversionDataLutEntry.Lut8ConversionTestData), MemberType = typeof(IccConversionDataLutEntry))]
         internal void LutEntryCalculator_WithLut8_ReturnsResult(IccLut8TagDataEntry lut, Vector4 input, Vector4 expected)
         {
@@ -25,7 +25,7 @@ namespace SixLabors.ImageSharp.Tests.ColorProfiles.Icc.Calculators
             VectorAssert.Equal(expected, result, 4);
         }
 
-        [Theory(Skip = "Results do not match not expected.")]
+        [Theory]
         [MemberData(nameof(IccConversionDataLutEntry.Lut16ConversionTestData), MemberType = typeof(IccConversionDataLutEntry))]
         internal void LutEntryCalculator_WithLut16_ReturnsResult(IccLut16TagDataEntry lut, Vector4 input, Vector4 expected)
         {

tests/ImageSharp.Tests/TestDataIcc/Conversion/IccConversionDataLutEntry.cs

@@ -49,13 +49,13 @@ public class IccConversionDataLutEntry
 
     public static object[][] Lut8ConversionTestData =
     {
-        new object[] { Lut8, new Vector4(0.2f, 0.3f, 0, 0), new Vector4(0.339762866f, 0, 0, 0) },
+        new object[] { Lut8, new Vector4(0.2f, 0.3f, 0, 0), new Vector4(0.4578933760499877f, 0, 0, 0) },
-        new object[] { Lut8Matrix, new Vector4(0.21f, 0.31f, 0.41f, 0), new Vector4(0.431305826f, 0, 0, 0) },
+        new object[] { Lut8Matrix, new Vector4(0.21f, 0.31f, 0.41f, 0), new Vector4(0.40099657491875312f, 0, 0, 0) },
     };
 
     public static object[][] Lut16ConversionTestData =
     {
-        new object[] { Lut16, new Vector4(0.2f, 0.3f, 0, 0), new Vector4(0.245625019f, 0, 0, 0) },
+        new object[] { Lut16, new Vector4(0.2f, 0.3f, 0, 0), new Vector4(0.3543750030529918f, 0, 0, 0) },
-        new object[] { Lut16Matrix, new Vector4(0.21f, 0.31f, 0.41f, 0), new Vector4(0.336980581f, 0, 0, 0) },
+        new object[] { Lut16Matrix, new Vector4(0.21f, 0.31f, 0.41f, 0), new Vector4(0.29739562389689594f, 0, 0, 0) },
     };
 }